Traction-wheel.



G. H. WILSON.

TRACTION WHEEL.

APPLICATION FILED JAN 16, 19:4.

Patented Dec. 28, 1915.

74 F'Z' .2. J] 9 G607" a H M75077 2115' fl/farfie y.

GEORGE I-I. WILSON, 0F MINNEAPOLIS, MINNESOTA.

TRACTION-WHEEL.

Specification of Letters Patent.

Patented Dec. 28, 1915.

Application filed January 16, 1914. Serial No. 812,473.

To all whom it may concern:

Be it known that I, GEORGE H. WILSON, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inTraction- Wheels, of which the following is a specification.

My invention relates to traction wheels and has for its object toprovide a cleat or lug for a traction wheel which shall be simple tomake, in a high degree eflicient, will obviate defects inherent in knownforms of cleats and lugs, and, while being strong and durable and givinga complete rolling contact to the wheel, is nevertheless provided withan edge suiiiciently narrow to make Effective penetration even on veryhard suraces.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and are particularlypointed out in the claims.

In the drawings, illustrating the application of my invention in oneform,-Figure 1 is a fragment of a traction wheel showing a series of myimproved cleats applied to the tire. Fig. 2 is a plan view of the partsshown in Fig. 1. Fig. 3 is an enlarged sectional view taken on line 3-3of Fig. 2.

My lug, as shown, consists of a piece of flat metal of the desireddimensions turned into the form of a spiral 10, having ends 11 and 12laid flat in the plane of one set of edges of the spiral, as clearlyindicated in Figs. 1 and 3. By means of bolts 13 the nuts 11 and 12 aresecured upon the outer face of tire 14. The bars as a whole are placedangularly along the face of the tire so as to bring the individual turns15 at the top of the spiral in a position to extend at right anglesacross the face of the tire, as clearly indicated in Fig. 2. Aside fromthe twisting of the spirals, no forming is necessary to make the outerlimits follow the curve of the Wheel when the cleats are placeddiagonally, as these will be brought automatically into that curve bybolting down the ends or ears 11 and 12 upon the face of the tire. Itwill be seen that each of the spiral cleats 10 in fact provides amultiplicity of traction lugs 15, which although extended andcomparatively thin, are, nevertheless, suiiiciently strong for thepurpose because of the supporting character of other portions of thespiral. Furthermore, owing to the spiral character of the cleat as awhole. it is selfcleaning. The pressure exerted by the machine uponearth accumulating about the cleat will spread out and remove such earthbecause it does not have lateral support in either direction, as isclearly apparent from an inspection of Fig. 1. If desired, the cleatsmay be put so closely together that there will be no extensive gapbetween cleats.

It is obvious that my cleats may be made cheaply and applied to thetraction wheel with facility, and that highly eflicient results will beobtained from their use.

I claim:

1. In combination with the tire of a trac tion wheel a cleat of spiralform secured obliquely upon the face of said tire so that the upperturns of the spiral will extend transversely across the tire.

2. A traction wheel comprising a tire, a cleat formed of a flat bartwisted into a spiral form and having ears at the ends thereof in theplane of one set of elements of the spiral, said ears being bolted tothe tire.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE H. WILSON.

Witnesses:

F. A. WHITELEY, H. A. BOWMAN.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. G.

